Segment Reporting - Schedule of Segments (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Operating revenues	$ 863.5	$ 814.3	$ 1,514.7	$ 1,362.8
Brokerage commissions and other, net	9.8	8.6	19.3	16.6
General and administrative expense	(62.3)	(62.2)	(126.2)	(117.9)
Catastrophic event-related charges, net	(0.1)	(0.1)	(0.9)	(0.1)
Asset impairments	6.5	0.1	8.9	0.7
Loss on Extinguishment of Debt	0.0	(0.1)	0.0	(0.4)
Interest on mandatorily redeemable preferred OP units / equity	(0.9)	(1.1)	(1.9)	(2.1)
Gain / (loss) on remeasurement of marketable securities	5.8	(32.3)	(14.1)	(66.8)
Gain on foreign currency exchanges	2.7	9.0	0.0	6.8
Gain / (loss) on dispositions of properties	(0.6)	(0.1)	(2.2)	13.3
Other income / (expense), net	(0.8)	0.4	(1.8)	(0.2)
Loss on remeasurement of notes receivable	(0.1)	0.0	(1.8)	0.2
Income / (loss) from nonconsolidated affiliates	(0.7)	0.9	(0.9)	1.8
Total Income / (Loss) from Nonconsolidated Affiliates	(0.7)	0.9	(0.9)	1.8
Gain on remeasurement of investment in nonconsolidated affiliates	0.0	0.4	(4.5)	0.5
Deferred tax benefit	7.7	0.3	12.3	0.3
Net Income	97.5	81.3	64.6	82.8
Less: Preferred return to preferred OP units / equity interests			5.7	6.1
Less: Income attributable to noncontrolling interests			(0.8)	2.0
Net income attributable to SUI common shareholders	89.8	74.0	59.7	74.7
MH
Segment Reporting Information [Line Items]
Operating revenues	408.2	396.8	760.7	676.3
RV
Segment Reporting Information [Line Items]
Operating revenues	192.9	193.0	310.2	313.8
Marina
Segment Reporting Information [Line Items]
Operating revenues	262.4	224.5	443.8	372.7
Operating Segments
Segment Reporting Information [Line Items]
Operating revenues	839.7	798.4	1,470.0	1,332.1
Operating expenses / Cost of sales	461.5	423.7	811.4	695.5
NOI	378.2	374.7	658.6	636.6
Operating Segments | MH
Segment Reporting Information [Line Items]
Operating revenues	390.8	385.1	729.0	654.3
Operating expenses / Cost of sales	189.8	181.9	351.9	289.3
NOI	201.0	203.2	377.1	365.0
Operating Segments | RV
Segment Reporting Information [Line Items]
Operating revenues	187.8	189.5	299.7	306.1
Operating expenses / Cost of sales	98.7	99.6	165.3	166.7
NOI	89.1	89.9	134.4	139.4
Operating Segments | Marina
Segment Reporting Information [Line Items]
Operating revenues	261.1	223.8	441.3	371.7
Operating expenses / Cost of sales	173.0	142.2	294.2	239.5
NOI	88.1	81.6	147.1	132.2
Segment Reconciling Items
Segment Reporting Information [Line Items]
Interest income	14.0	7.3	25.4	14.1
Brokerage commissions and other, net	9.8	8.6	19.3	16.6
General and administrative expense	(62.3)	(62.2)	(126.2)	(117.9)
Catastrophic event-related charges, net	0.1	(0.1)	(0.9)	(0.1)
Business combination expense, net	(0.2)	(15.0)	(3.0)	(15.5)
Depreciation and amortization	(164.1)	(150.1)	(319.7)	(298.0)
Asset impairments	6.5	0.1	8.9	0.7
Loss on Extinguishment of Debt	0.0	(0.1)	0.0	(0.4)
Interest expense	(79.2)	(55.3)	(155.8)	(100.5)
Interest on mandatorily redeemable preferred OP units / equity	(0.9)	(1.1)	(1.9)	(2.1)
Gain / (loss) on remeasurement of marketable securities	5.8	(32.3)	(14.1)	(66.8)
Gain on foreign currency exchanges	2.7	9.0	0.0	6.8
Gain / (loss) on dispositions of properties	(0.6)	(0.1)	(2.2)	13.3
Other income / (expense), net	(0.8)	0.4	(1.8)	(0.2)
Loss on remeasurement of notes receivable	(0.1)	0.0	(1.8)	0.2
Income / (loss) from nonconsolidated affiliates			(0.9)	1.8
Total Income / (Loss) from Nonconsolidated Affiliates	(0.7)	0.9
Gain on remeasurement of investment in nonconsolidated affiliates	0.0	0.4	(4.5)	0.5
Current tax expense	(5.4)	(3.9)	(9.3)	(5.2)
Deferred tax benefit	7.7	0.3	12.3	0.3
Net Income	97.5	81.3	64.6	82.8
Less: Preferred return to preferred OP units / equity interests	3.3	3.1
Less: Income attributable to noncontrolling interests	4.4	4.2
Net income attributable to SUI common shareholders	$ 89.8	$ 74.0	$ 59.7	$ 74.7